For those of you who are involved in the management and monitoring of small to mid-size Microsoft infrastructures, I would thoroughly reccomend that you have a look at System Center Essentials (SCE) 2007. RC1 for this product has been released.
In a nutshell, SCE 2007 provides a unified management solution that enables IT professionals in midsize organizations to proactively manage their IT environment with increased efficiency. It's designed for organisations with up to 30 Windows servers and 500 Windows clients and will allow you to perform the following tasks:
The great thing about SCE 2007 is that it's a single server solution, and all of the available functionality can be managed from a single console. It really has been developed with the small to midsize enterprise in mind.
You can get further information, including a demo of the product at http://www.microsoft.com/systemcenter/sce/default.mspx
Those of you who read my post on RC1 for System Center Essentials, http://blogs.technet.com/mcs-ireland-infrastructure/archive/2007/04/24/system-center-essentials-2007-rc1-released.aspx